Free tools for running a trade business

Real invoices, real pricing math, and calculators built on cited standards, ACCA, ASHRAE, and standard trade formulas, not guesses. Every one of them shows a working result before it asks you for anything.

AI Invoice Generator

Business, client, line items, your own price. A real downloadable invoice, built for HVAC, plumbing, electrical, and every other trade.

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AI Estimate Generator

Business, client, line items, your own price, and a valid-until date. A real downloadable estimate for the job, not a bill for one already done.

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Profit Margin Calculator

Enter revenue and cost of goods. See your margin instantly against a typical range for your trade, not a bare number sitting alone.

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Air Duct Size Calculator

Airflow and friction rate in, a round duct diameter out. The same equal-friction method a physical ductulator wheel uses.

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HVAC Load Calculator (Manual J)

Square footage, climate, and insulation in, a heating and cooling load estimate out. Weighs the same variables ACCA Manual J does.

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Pipe Volume Calculator

Inner diameter and length in, volume in gallons out. Standard cylinder-volume geometry, no guessing on a flush or fill job.

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Business Name Generator

Trade and a few vibe words in, 8 to 10 full name, tagline, and bio sets out at once. No blurring results to force a signup.

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ACH Calculator

Room dimensions and airflow in, air changes per hour out. The standard ventilation formula for confirming a space is properly ventilated.

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HVAC CFM Calculator

Room dimensions and target ACH in, required airflow out. Includes a typical-ACH reference table by room type.

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Flow Rate Calculator

Pipe diameter and velocity in, volumetric flow rate out in cubic feet, gallons per minute, and gallons per hour.

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Parts Markup Calculator

Cost price and markup percentage in, selling price and markup amount out.

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Labor Rate Calculator

Overhead, tech count, and profit goal in, your billable hourly rate out, break-even rate included.

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Business Valuation Calculator

Net income, depreciation, and your earnings multiplier in, an estimated business value out.

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Refrigeration BTU Calculator

Walk-in dimensions and temperatures in, cooling capacity out. A fast field estimate for sizing a cooler or freezer.

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Roofing Calculator

House footprint and roof pitch in, true roof area and a shingle bundle estimate out.

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SEER Energy Savings Calculator

Current and new SEER rating in, annual dollar savings out. Shows customers a real number, not just a rating.

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